Knauf Air Duct Board-M with Hydroshield Technology is a resin-bonded fiber glass formed into rigid, rectangular boards faced on one side with a fire-resistant foil-scrim-kraft (FSK) vapor retarder, and its airstream surface is faced with a tightly bonded, non-woven mat. Available in EI-475 or EI-800, with butt edge or factory-applied shiplap edge, it offers excellent thermal and acoustical performance.

Hydroshield Technology helps keep moisture from penetrating the airstream surface of the product, reducing the opportunity for water to penetrate the board. It is important to note that liquid water should be kept out of any HVAC system regardless of the materials employed. Hydroshield Technology is a product feature that enhances the water hold-out properties of the airstream surface of the product; however, it does not eliminate the opportunity for moisture to penetrate the board.

Knauf Air Duct Board-M is designed for commercial and residential air handling installations for cooling, heating, or dual-temperature service where good temperature control, noise absorption, and abuse resistance are required.

• Hydroshield Technology mat facing.
• Low thermal conductivity of 0.23 at 75°F (24°C) mean temperature.
• Low installed cost, insulated duct system.
• Excellent acoustical characteristics.
• Assured insulation thickness, shiplap joints, and FSK vapor retarder.
• If necessary, can be cleaned in accordance with NAIMA's "Cleaning Fibrous Glass Insulated Air Duct Systems Recommended Practices."
• Knauf Air Duct Board systems meet the fire and smoke safety regulations of most federal, state, and local building codes.

Benefits

• Moisture hold out properties that significantly reduce the opportunity for moisture to penetrate the air stream surface.
• Airstream surface is significantly more resistant to abuse than coated duct board products.
• Does not support growth of mold, fungi, or bacteria.
• Airstream surface is 20% less porous to air than coated duct board products.
• Fabrication in shop environment lowers field installation time.
• One craft required to fabricate and install system.
• Minimum capital investment for fabrication equipment.
• Portability allows for assembly or fabrication at job site.
• Lower installation cost than with duct wrap and duct liner.
• Quiet, efficient air delivery.
• Reduces noise generated by air turbulence and mechanical equipment.
• Eliminates "booming" and "cracking" sounds caused by sheet metal duct contraction and expansion.
• Condensation control.
• Strong thermal performance.
• Code compliance.

Specification Compliance

In U.S.:

• ASTM C 1136; Type II (FSK facing)
• ASTM D 5116
• ASTM G 21, G 22
• BOCA
• CABO
• California Title 24
• Corps of Engineers Guide Specifications
• ICBO
• International Mechanical Code
• NFPA 90A and 90B
• SBCCI
• State of Alaska IAQ Specifications
• State of Washington IAQ Specifications
• UL 181; Class 1

In Canada:

• CAN/ULC S102-M88
• CAN/CGSB 51-GP-52M (facing)
• CAN/CGSB 51.10-92
• ULC Issue 869C; Class 1

Technical Data

Surface Burning Characteristics

• UL/ULC listed.
• Does not exceed 25 Flame Spread, 50 Smoke Developed when tested in accordance with ASTM E 84, CAN/ULC S102-M88, NFPA 255, and UL 723.

Flexural Rigidity

• Available in two stiffness values: EI-475 and EI-800.
• Flexural rigidity (EI) is the product of Young's modulus of elasticity (E) and moment of inertia (I) as determined in accordance with NAIMA AHS-100-74.

Service Temperature (ASTM C 411)

• Up to 250°F (121°C).

Air Velocity (UL 181)

• Maximum 5000 fpm (1524 mpm).
• Tested to 12,500 fpm (3810 mpm).

Internal Static Pressure (UL 181)

• Maximum ±2" water (498 pascals [Pa]).

Water Vapor Permeance (ASTM E 96)

• Less than 0.02 perms.

Water Vapor Sorption (ASTM C 1104)

• Less than 3% by weight.

Microbial Growth (ASTM G 21, G 22, UL 181)

• Does not promote or support the growth of mold, fungi, or bacteria.
• Airstream surface mat-facing is treated with an EPA-registered anti-microbial agent to aid in the prevention of fungal and bacterial growth.

Airstream Surface Abuse (K-103)

• Average of 370 seconds to surface penetration.

Application and Specification Guidelines

Storage

• Protect stored duct board from water damage, construction damage, and other abuse.
• If stored outside, proper protection from weather conditions should be provided.

Application

• Duct shall be fabricated and installed in strict accordance with NAIMA's "Fibrous Glass Duct Construction Standard," "Residential Standard," "1¹/_²" Fabrication Manual," or Knauf Insulation "Air Duct Fabrication Manual," and in accordance with the conditions of UL 181 listing. Duct systems shall have all transverse joints, longitudinal seams, and duct wall penetrations sealed using 3" (76 mm) wide glass fabric and mastic, 2" (51 mm) minimum width heat-sealable tape, or 2" (51 mm) minimum width pressure-sensitive tape with acrylic adhesive. Rubber based adhesives are not approved.
• Only UL 181-A listed and labeled products shall be used for closure systems. A listing of approved closure products is available from you local Knauf sales representative.
  
  PRESSURE-SENSITIVE TAPES: Only those tapes listed under and imprinted with designation UL 181 A-P and registered with UL.
  HEAT-SEALABLE TAPES: Only those tapes listed under and imprinted with designation UL 181 A-H and registered with UL.
  MASTICS: Mastic systems listed and registered with UL and carrying the designation UL 181 A-M used in conjunction with a 3" (76 mm) wide glass fabric.

Procedures Closure If the closure system used is not one of the approved systems described above, and if application is not in accordance with stated procedures, Knauf Insulation assumes no liability for duct system performance. Use of a non-UL registered and listed closure voids the UL 181 Class 1 rating as well as Knauf's product performance warranties. Reinforcements Duct sections shall be additionally reinforced where necessary, according to Knauf Insulation and NAIMA standards. Ductwork shall be supported as required on straight runs, at all turns, and at transitions to maintain proper alignment. Hangers and supports shall be in strict accordance with Knauf Insulation and NAIMA standards.

When used in accordance with NAIMA and Knauf Insulation application instructions, the closure systems described herein meet UL 181 requirements, and the resulting system carries a Class 1 Air Duct rating. This data sheet is not intended to be a design or fabrication manual. For specific details and recommendations on fabrication, reinforcement, hanging, and other details, refer to the latest edition of the NAIMA "Fibrous Glass Duct Construction Standard," "Residential Standard," "1¹/_²" Fabrication Manual," or Knauf Insulation "Air Duct Fabrication Manual." Application and installation procedure is at the discretion of and is the responsibility of the Design Engineer to meet specific job requirements. The chemical and physical properties of Knauf Air Duct Board-M with Hydroshield™ Technology represent typical average values determined in accordance with accepted test methods. The data is subject to normal manufacturing variations. The data is supplied as a technical service and is subject to change without notice. References to numerical flame spread ratings are not intended to reflect hazards presented by these or any other materials under actual fire conditions. Check with your Knauf regional office to assure information is current.

Description

Knauf Duct Liner E•M is a flexible, mat-faced insulation made from inorganic glass fibers bonded

by a thermosetting resin with an encapsulant edge coating. It is faced with a tightly bonded mat to give

the airstream a smooth, tough surface, resisting damage during installation and operation. The encapsulant

edge coating eliminates airstream flaring.

Application

Specifically designed as an interior insulation material for sheet metal ducts used in heating,

ventilating and air conditioning. Provides an optimum combination of efficient sound absorption,

low thermal conductivity and minimal airstream surface friction.

Features and Benefits

• Low thermal conductivity.

• Fire-resistant, non-corrosive, durable and resilient.

• Tough, tightly bonded mat facing.

• Excellent sound absorption.

• Energy conservation.

• Better temperature control.

• Lowers operating costs.

• Greatly reduces noise from fans and mechanical equipment as well as cross-talk and air movement.

• Withstands damage from normal handling and shop abuse.

• If necessary, can be cleaned in accordance with NAIMA's "Cleaning Fibrous Glass Insulated Air Duct Systems Recommended Practices."

Specification Compliance In U.S.:

• ASTM C 1071; Type I

• ASTM D 5116

• ASTM G 21, G 22

• GREENGUARD Environmental Institute™

• NFPA 90A and 90B

• State of Alaska IAQ Specifications

• State of Washington IAQ Specifications

In Canada:

• CAN/ULC S102-M88

• CAN/CGSB-51.11-92

Technical Data

Surface Burning Characteristics

• UL/ULC listed.

• Does not exceed 25 Flame Spread, 50 Smoke Developed when tested in accordance

with ASTM E 84, CAN/ULC S102-M88, NFPA 255 and UL 723.

Temperature Range (ASTM C 411)

• Up to 250°F (121°C).

Air Velocity (ASTM C 1071)

• Maximum 6000 fpm (1829 mpm).

• Tested to 15,000 fpm (4572 mpm).

Water Vapor Sorption (ASTM C 1104)

• Less than 3% by weight.

Microbial Growth (ASTM C 1338, G 21, G 22)

• Airstream surface mat facing is treated with an EPA-registered anti-microbial agent to aid in the prevention of fungal and bacterial growth.

• Does not promote or support the growth of mold, fungi or bacteria.

Application & Specification Guidelines

Storage

• Inside storage is recommended.

Fabrication and Application

• Fabricate in compliance with the latest edition of NAIMA's Fibrous Glass Duct Liner Standard.

• Liner shall be folded and compressed in the corners of rectangular duct sections or shall be cut and fit to assure lapped, compressed joints. Longitudinal joints in duct liner should not occur except at the corner of ducts. Longitudinal joints in liner shall be coated with adhesive. All damaged areas of the air stream surface shall be repaired with an adhesive which conforms to ASTM C 916.

• Liner should be adhered to the duct with 90% minimum area coverage of an adhesive which conforms to ASTM C 916.

• Mechanical fasteners should not compress the insulation more than ⅛" (3 mm), and shall be installed perpendicular to the duct surface. All fasteners should comply with the guidelines of NAIMA's Fibrous Glass Duct Liner Standard and the Mechanical Fastener's Standard MF-1-1975.

• Metal nosings shall be securely installed over transversely oriented liner edges facing the

airstream at fan discharge, at access doors and at any interval of lined duct preceded by unlined duct. In addition, where velocities exceed 4000 fpm (1219 mpm), metal nosing small be used on upstream edges of liner at every transverse joint (See illustration, right.)

Limitations

• Knauf Duct Liner E•M should not be used in systems operating at velocities exceeding 6000 fpm (1829 mpm) or at temperatures above 250°F (121°C).

The Anguil Rotor Concentrator/Oxidizer is designed to adsorb Volatile Organic Compounds (VOCs) from a high volume, low concentration airstream and to oxidize the VOCs in a reduced volume, high concentration process stream.

The high volume airstream is passed through a rotor concentrator wheel where the VOCs are adsorbed in the bed, purifying the high volume air. This high volume air is then exhausted to atmosphere. The concentrator wheel rotates continuously, transporting adsorbed VOCs into a desorption section. In the desorption section, the adsorbed organics are desorbed from the adsorptive media with a low volume heated airstream. This low volume, high VOC-laden air is then processed by an oxidizer. The operational cost of the oxidizer is substantially reduced via this concentration process.

The Rotor Concentrator/Oxidizer is often the most cost effective technology for processing high volume, low VOC concentration streams. While the capital cost of a system is competitive with other technologies, the true savings are realized in reduced operating costs.

A prefabricated steam humidifier system, the Armstrong HumidiPack® comes ready for insertion into the duct. It consists of a separator/header and multiple tube dispersion assembly when supplied for use with Armstrong steam generators. For use on pressurized steam, included are steam control valve, strainer, steam trap and a header drain trap.

The HumidiPack accepts steam, separates entrained moisture from it and admits it into a duct or air handler airstream via the dispersion tube. It does all of this while simultaneously reducing the moisture non-wetting distance when compared to traditional humidifiers. Why is this important?

When "dry" steam is discharged into duct air it instantly condenses. The resulting water droplets are entrained in the airstream until they can be absorbed (evaporate) by the air. The distance traveled by the water droplets in the airstream depends on a number of factors, including the design of the despersion system. If the water droplets hit an obstruction in the duct (turning vanes, coil, fan, filter, sensors, etc.) before the evaporation occurs, the water will impinge on the obstruction. In other words, the obstruction acts as a separator and will remove the water droplets from the air. The water removed from the air will accumulate on the obstruction and in the bottom of the duct resulting in stagnant water, corrosion, and IAQ concerns. Thus proper allowance in the duct for the "non-wetting distance" is an important issue in the design and installation of steam humidification equipment. Shorter "non-wetting distances" simplify the job of the design engineer by allowing proper placement of temperature and humidity controllers and other components without fear of inaccurate readings or moisture-damaged equipment.

HumidiPackPlus™ combines a shortened non-wetting distance with steam-jacketed "active" tubes. The result is a dry, uniform discharge of steam for nearly any application with a steam source from a pressurized central supply.

HumidiPack and HumidiPackPlus steam humidifier systems and includes a complete discussion of impingement distance, capacities, selection/ordering information, control valve selection, dimensional drawings/physical data and installation facts. To download, click on the line below.

Guaranteed, short absorption and now significant energy savings!
Others have never come close to Ultra-sorb and Rapid-sorb's proven and guaranteed absorption capabilities. If you must achieve absorption within a short or critical distance, there is no better choice than DRI-STEEM's UItra-sorb and Rapid-sorb dispersion systems.

Now, DRI-STEEM has taken this industry-leading performance one step further with its revolutionary patent-pending High-efficiency Tube option for new and existing applications using Ultra-sorb and Rapid-sorb dispersion.

High-efficiency tube benefits are staggering: Significant energy savings, sizable reduction in downstream heat gain, and substantial reduction in dispersion-generated condensate!

Steam releases heat as it condenses
Ultra- sorb and Rapid-sorb dispersion assemblies typically disperse steam into 50-55° F airstreams. This cool air flowing across uninsulated hot dispersion tubes causes some steam inside the tubes to condense. Steam gives up heat as it condenses. This heat passes easily through uninsulated stainless steel dispersion tubes into the airstream, increasing downstream air temperature. The amount of condensate produced is directly proportional to downstream air heat gain.

Advanced insulation meets stringent requirements
The obvious solution to the problem of unwanted heat gain and resource waste is insulated dispersion tubes. DRI-STEEM co-developed Polyvinylidene fluoride (PVDF) insulation for humidification applications. PVDF is a rugged insulation perfectly suited for insulating dispersion tubes. PVDF insulation is an advanced material commonly used in chemical, semiconductor, medical, defense, and aerospace industries.

The performance you expect from DRI-STEEM
Of course, the real test of PVDF-insulated, high-efficiency tubes is performance:

• PDVF-insulated tubes reduce airstream heat gain and condensate production by up to 85% when compared to uninsulated tubes - regardless of load or airstream temperature.
• Condensate reduction correlates directly to energy savings. Every pound of condensate that does not drain from the dispersion assembly saves about 1,000 Btus - the amount of energy required to boil a pound of water into steam (in a nonpressurized vessel at sea level).
• Condensate reduction allows using smaller steam generators. With a higher percentage of generated steam meeting the humidification load rather than draining from the dispersion assembly as condensate, steam generators can be downsized in many cases.
• Adding PVDF insulation to dispersion tubes causes no excessive airflow pressure drop - the dense, closed-cell insulation provides exceptionally high performance at 1/8" thickness.
• Energy savings provides product payback in less than one year for electric humidification systems, and in about 1½ years for natural gas systems

Dedicated desiccant air-supply units provide low-humidity discharge conditions necessary to maintain a dry environment. It's a simple solution to an old problem. The solid desiccant rotor absorbs moisture from process air. The moisture is taken out of the rotor by a second and separate reactivating airstream. This process enables the rotor to continually take moisture out of the airstream without interruption.

DH Series units provide an excellent stand-alone solution when sensible heat gain is not a concern. To solve existing moisture problems DH Series units can be added to existing conventional HVAC systems. The fully integrated dehumidifier is complete with process and reactivation filters, fans and the complete control system for safe operation. Choose between direct gas fired, steam, or electric actively heated reactivation.

CDI offers DH units with a maximum process air volume of 1,500 to 47,000 scfm. Units are designed with custom configurations of standard components to meet unique project requirements. Total system integration is also available including heating, cooling, enthalpy recovery and special filtration.

Why Use Desiccant Technology?
Very dry air can be achieved.

Better thermodynamic efficiency: Achieved because no change of phase (condensation) is necessary.

Simple construction: Basic dehumidifier includes only two fans, a heater and the desiccant rotor assembly.

Simple maintenance: Simply replace filters regularly and performance is assured. A yearly inspection by our service technicians is recommended to head off unscheduled outages.

Better construction: Double-wall insulated casing suitable for indoor or outdoor mounting.

Modern controls: CDI includes standard intelligent microprocessor controllers with "Fail Capable" mode and full building integration capable of using BACnet™, Modbus®, or LonWorks®.

Provide Dry Desiccant Air Supply

Uncontrolled humidity does not need to be a problem. By providing dry desiccant air supply you can control threats to safety, product and costs. Dry air is a solution to corrosion, bacterial, mold, and mildew growth. By using a CDI DH Series unit you can have independent control of moisture levels and temperatures. Now you can be as dry as you want at whatever temperature you want.

Schools, Hotels & Commercial Buildings

By centralizing the outdoor air and humidity control, individual conditioning units are only required to control sensible temperature. The dehumidified supply-air stream does not contribute to fungal growth in the distribution system and can actually reduce mold growth in secondary systems.

Wastewater Treatment Plants

Water filtration and wastewater treatment facilities commonly suffer from corrosion, mold, mildew, and poor reliability of electronic devices caused by condensation. This is especially true in northern climates where very cold influents are prevalent. Cold influent pipes sweat during elevated ambient humidity. By controlling the humidity of the air surrounding these cold pipes, condensation is eliminated.

Humidity control level is directly dependent upon the coldest surface temperature. CDI's DH Series desiccant dehumidifiers actively reduce the space dew point to a level required to prevent sweating. In addition, CDI's proprietary microprocessor prevents the room humidity from ever exceeding a set value.

Industrial/Manufacturing

Many industrial companies use chilled water to remove heat from various manufacturing processes. As the air or process is cooled below the ambient dew point, condensation can occur. Desiccant dehumidifiers can eliminate the condensation. Often, this results in a higher quality part or reduced cycle time, allowing parts to be produced faster.

Applications include industrial painting booths, glass laminating, electronics, and plastic injection or blowing molding. Processes requiring air at or below a 45° dew point can utilize CDI's DH products to stabilize manufacturing consistency.

Cold Storage Loading Docks

By circulating dehumidified air through the loading dock or corridor, the relative humidity is lowered from 90% RH to 50% RH, reducing the latent requirements on the refrigeration system. The moisture is removed by the desiccant system, allowing the refrigeration system to control sensible temperature more efficiently. The dry dehumidified air is discharged directly over the access doorways to the storage freezer. This prevents moisture infiltration avoiding frost and ice buildup in the freezer. The dehumidifier provides a safer working environment with less maintenance costs.